function s1_hello(){ 

echo "hello,world!" 

} 

s1_hello 

function s2_tell_who_i_am(){ 

echo "Enter you name:" 

read user_name 

echo "user name is $user_name" 

} 

s2_tell_who_i_am 

function s3_which_distro_do_i_use(){ 

NAME="Beta Linux" 

echo $NAME 

} 

s3_which_distro_do_i_use 

function s4_view_my_cpu_arch(){ 

uname -m 

} 

s4_view_my_cpu_arch 

function s5_show_first_scsi_disk_size(){ 

lsblk -l | \grep disk | \grep '^sda ' | awk '{print $4}' 

} 

s5_show_first_scsi_disk_size 

function s6_show_main_memory_size_in_megabytes(){ 

free -m |grep "Mem:" | awk '{print $2}' 

}